US4749763A - Crystalline isotactic poly(para-methylstyrene) - Google Patents
Crystalline isotactic poly(para-methylstyrene) Download PDFInfo
- Publication number
- US4749763A US4749763A US06/785,193 US78519385A US4749763A US 4749763 A US4749763 A US 4749763A US 78519385 A US78519385 A US 78519385A US 4749763 A US4749763 A US 4749763A
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- US
- United States
- Prior art keywords
- para
- methylstyrene
- crystalline
- isotactic poly
- crystalline isotactic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F12/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F12/02—Monomers containing only one unsaturated aliphatic radical
- C08F12/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F12/06—Hydrocarbons
- C08F12/12—Monomers containing a branched unsaturated aliphatic radical or a ring substituted by an alkyl radical
Definitions
- isotactic crystallizable polymers of vinyl aromatic polymers such as styrene and certain substituted styrenes are known.
- Sterospecific polymerization with Ziegler catalysts for example, has been used successfully to prepare isotactic crystallizable polymers from styrene and many members of the styrene family as described in Natta et al, Makromol. Chemie 28,253 (1958) reprinted in Natta and Danusso, "Stereoregular Polymers, and Stereospecific Polymerizations", Pergammon Press Ltd., London, 1967, Volume 2, p. 570.
- Crystalline isotactic poly(para-methylstyrene) has been obtained by polymerization of a high purity para-methylstyrene isomer (99%+) with a Ziegler catalyst and fractionation of the product.
- the first fraction was a high molecular weight polymer having 40% crystallinity and a crystalline melting point of 205° C.
- Para-methylstyrene can be prepared by the dehydrogenation of para-ethyltoluene. Suitable methods and catalysts are generally known. The catalyst and method disclosed U.S. Pat. No. 4,496,662 which is incorporated herein by reference, can be used.
- Para-ethyltoluene having a suitably high content of the para-isomer can be prepared in accordance with U.S. Pat. Nos. 4,086,287, 4,117,024 and 4,447,666 which are incorporated herein by reference.
- Polymerization of para-methylstyrene can be conducted with a catalyst which gives a steroregular product.
- catalysts which polymerize propylene to steroregular polypropylene are suitable.
- Ziegler catalysts particularly those prepared from TiCl 3 and organoaluminum compounds can be used.
- the polymerized poly(para-methylstyrene) product can be fractionated in a suitable solvent to derive a crystallizable isotactic fraction.
- a suitable solvent toluene and isopropanol have been found to be suitable solvent systems for fractionation, generally in a toluene: isopropanol weight ratio of 5:1 to 1.5:1 by volume.
- the crystallizable poly(para-methylstyrene) of this invention can be used in the manner which the corresponding polystyrene polymers are used.
- the polymers of this invention can be used in films and similar articles particularly where a high crystalline melting point is desirable.
- Para-methylstyrene (PMS) having a para isomer content of greater than 99% was used as monomer. All glassware had been cleaned and dried in a 120° C. oven over the weekend. Toluene was dried over molecular sieves under nitrogen over the weekend.
- the polymer was then fractionated into 3 fractions by isopropanol/toluene solvent.
- the original polymer, reprecipitated polymer and the fractionated polymer samples were analyzed for melting point.
- the first fraction which is high molecular weight polymer had a melting point at 205° C. This polymer had 40% crystallinity.
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Abstract
Crystalline isotactic poly(para-methylstyrene) previously unreported in the literature is prepared by polymerizing para-methylstyrene with a TiCl3 /aluminum alkyl catalyst and fractionating the product to obtain a crystalline fraction with a crystalline melting point of 205° C.
Description
A variety of isotactic crystallizable polymers of vinyl aromatic polymers such as styrene and certain substituted styrenes are known. Sterospecific polymerization with Ziegler catalysts, for example, has been used successfully to prepare isotactic crystallizable polymers from styrene and many members of the styrene family as described in Natta et al, Makromol. Chemie 28,253 (1958) reprinted in Natta and Danusso, "Stereoregular Polymers, and Stereospecific Polymerizations", Pergammon Press Ltd., London, 1967, Volume 2, p. 570. However, Natta et al report that p-fluourostyrene is the only mono-para-substituted styrene they were able to polymerize to a crystalline isotactic polymer. In contrast they found the ortho- and meta-isomers readily gave methylstyrene polymers which were crystallizable. Nor have we found crystalline isotactic poly(para-methylstyrene) reported elsewhere in the literature.
Crystalline isotactic poly(para-methylstyrene) has been obtained by polymerization of a high purity para-methylstyrene isomer (99%+) with a Ziegler catalyst and fractionation of the product. The first fraction was a high molecular weight polymer having 40% crystallinity and a crystalline melting point of 205° C.
Para-methylstyrene can be prepared by the dehydrogenation of para-ethyltoluene. Suitable methods and catalysts are generally known. The catalyst and method disclosed U.S. Pat. No. 4,496,662 which is incorporated herein by reference, can be used.
Para-ethyltoluene having a suitably high content of the para-isomer can be prepared in accordance with U.S. Pat. Nos. 4,086,287, 4,117,024 and 4,447,666 which are incorporated herein by reference.
Polymerization of para-methylstyrene can be conducted with a catalyst which gives a steroregular product. In general, catalysts which polymerize propylene to steroregular polypropylene are suitable. For example, Ziegler catalysts, particularly those prepared from TiCl3 and organoaluminum compounds can be used.
If necessary, the polymerized poly(para-methylstyrene) product can be fractionated in a suitable solvent to derive a crystallizable isotactic fraction. Mixtures of toluene and isopropanol have been found to be suitable solvent systems for fractionation, generally in a toluene: isopropanol weight ratio of 5:1 to 1.5:1 by volume.
The crystallizable poly(para-methylstyrene) of this invention can be used in the manner which the corresponding polystyrene polymers are used. For example, the polymers of this invention can be used in films and similar articles particularly where a high crystalline melting point is desirable.
The invention is illustrated by the following non-limiting example in which all parts are by weight unless otherwise indicated.
Para-methylstyrene (PMS) having a para isomer content of greater than 99% was used as monomer. All glassware had been cleaned and dried in a 120° C. oven over the weekend. Toluene was dried over molecular sieves under nitrogen over the weekend.
All glassware and reactants were placed in a nitrogen dry box and 150 ml of dry toluene added to 4 oz. bottles. Then 5.7 ml of triethyl aluminum solution was added followed by 0.90 g of TiCl3 AA (aluminum activated TiCl3). After mixing, 15.0 g of PMS was added. The bottles were capped with a rubber septum and placed in a 60° C. water bath, stirred overnight, and cooled to room temperature. The polymerization product was precipitated into 2 liters of isopropanol, filtered and dried at 60° C. in vacuum. The polymer was reprecipitated from toluene/isopropanol (5/1 by volume) solution. The polymer was then fractionated into 3 fractions by isopropanol/toluene solvent. The original polymer, reprecipitated polymer and the fractionated polymer samples were analyzed for melting point. The first fraction which is high molecular weight polymer had a melting point at 205° C. This polymer had 40% crystallinity.
Although the present invention has been described with a preferred embodiment it is to be understood that modifications and variations may be restored to, without departing from the spirit and scope of this invention, as those skilled in the art will readily understand. Such variations and modifications are considered to be within the scope of the following claims.
Claims (7)
1. Crystalline isotactic poly(para-methylstyrene).
2. Crystalline isotactic poly(para-methylstyrene) having a crystallinity of at least 20%.
3. The crystalline isotactic poly(para-methylstyrene) of claim 2 having a crystallinity of at least 30%.
4. The crystalline isotactic poly(para-methylstyrene) of claim 2 having a crystallinity of about 40%.
5. The crystalline isotactic poly(para-methylstyrene) of claim 2 having a crystalline melting point of about 205° C.
6. A film of the poly(para-methylstyrene) of claim 1.
7. A film of the poly(para-methylstyrene) of claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/785,193 US4749763A (en) | 1985-10-07 | 1985-10-07 | Crystalline isotactic poly(para-methylstyrene) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/785,193 US4749763A (en) | 1985-10-07 | 1985-10-07 | Crystalline isotactic poly(para-methylstyrene) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US4749763A true US4749763A (en) | 1988-06-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/785,193 Expired - Fee Related US4749763A (en) | 1985-10-07 | 1985-10-07 | Crystalline isotactic poly(para-methylstyrene) |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US4749763A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3014887A (en) * | 1956-06-14 | 1961-12-26 | Shell Oil Co | Isotactic polystyrene compositions |
| US4230836A (en) * | 1979-04-26 | 1980-10-28 | Mobil Oil Corporation | Chemically cross-linked poly(p-methylstyrene) |
| US4306049A (en) * | 1978-01-19 | 1981-12-15 | Mobil Oil Corporation | Polymers of methyl ethenyl benzene |
-
1985
- 1985-10-07 US US06/785,193 patent/US4749763A/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3014887A (en) * | 1956-06-14 | 1961-12-26 | Shell Oil Co | Isotactic polystyrene compositions |
| US4306049A (en) * | 1978-01-19 | 1981-12-15 | Mobil Oil Corporation | Polymers of methyl ethenyl benzene |
| US4230836A (en) * | 1979-04-26 | 1980-10-28 | Mobil Oil Corporation | Chemically cross-linked poly(p-methylstyrene) |
Non-Patent Citations (2)
| Title |
|---|
| Natta et al, Makromol Chemie 28,253 (1958) reprinted in Natta and Danusso, "Stereoregular Polymers, and Stereospecific Polymerizations", Pergammon Press Ltd., London, 1967, vol. 2, p. 570. |
| Natta et al, Makromol Chemie 28,253 (1958) reprinted in Natta and Danusso, Stereoregular Polymers, and Stereospecific Polymerizations , Pergammon Press Ltd., London, 1967, vol. 2, p. 570. * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: MOBIL OIL CORPORATION, A CORP OF NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:GUNESIN, BINNUR Z.;MURRAY, JAMES G.;REEL/FRAME:004467/0511 Effective date: 19850912 |
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Year of fee payment: 4 |
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| REMI | Maintenance fee reminder mailed | ||
| LAPS | Lapse for failure to pay maintenance fees | ||
| FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19960612 |
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| STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |